Elastic and thermoelastic properties of synthetic Ca2MgSi2O7 ((a)over-circleakermanite) and Ca2ZnSi2O7 (hardystonite)

被引：18

作者：

Haussühl, S ^{[1
]}

Liebertz, J ^{[1
]}

机构：

[1] Univ Cologne, Inst Kristallog, D-50674 Cologne, Germany

来源：

PHYSICS AND CHEMISTRY OF MINERALS | 2004年 / 31卷 / 08期

关键词：

elastic constants; thermoelastic constants; Ca2MgSi2O7; Ca2ZnSi2O7;

D O I：

10.1007/s00269-004-0416-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Elastic and thermoelastic constants of large single crystals of Ca2MgSi2O7 and Ca2ZnSi2O7 have been derived from ultrasonic resonance frequencies of plane-parallel plates and their shift upon variation of temperature, respectively. In addition, coefficients of thermal expansion and dielectric constants were determined. Both species possess quite similar properties. As observed in other isotypic magnesium and zinc compounds, the mean elastic stiffness and the deviation from the Cauchy relations are significantly larger in the zinc compound, due to a covalent contribution of the Zn-O bond. Positive thermoelastic constants T-44 and T-66 in Ca2MgSi2O7 allow temperature-independent ultrasonic generators and oscillators to be manufactured.

引用

页码：565 / 567

页数：3

共 17 条

[1]

ALEKSANDROV KS, 1963, SOV PHYS-CRYSTALLOGR, V7, P753

[2]

BOHATY L, 1982, Z KRISTALLOGR, V159, P271

[3]

EVERY AG, 1992, LANDOLTBORNSTEIN N A, V29

[4]

FINCH CB, 1974, J CRYST GROWTH, V23, P295, DOI 10.1016/0022-0248(74)90072-4

[5]

HAUSSUHL S, 1990, Z KRISTALLOGR, V192, P53

[6] INTERPRETATION OF ELASTIC PROPERTIES OF IONIC-CRYSTALS - VALIDITY OF A QUASI-ADDITIVITY RULE [J].

HAUSSUHL, S .

ZEITSCHRIFT FUR KRISTALLOGRAPHIE, 1993, 205 :215-234

[7]

HAUSSUHL S, 1983, KRISTALLPHYSIK

[8]

Haussuhl S., 2001, HDB ELASTIC PROPERTI, VI

[9]

HEMINGWAY BS, 1986, CAN MINERAL, V24, P425

[10]

KIMATA M, 1981, NEUES JB MINER MONAT, P1

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